Title (en)

METHOD OF PRODUCING HIGH DENSITY SILICON NITRIDE SINTERED BODIES

Publication

EP 0334543 A3 19901017 (EN)

Application

EP 89302547 A 19890315

Priority

JP 6731388 A 19880323

Abstract (en)

[origin: EP0334543A2] A high density silicon nitride sintered body is obtained by preliminarily sintering a shaped body comprised of silicon nitride powder of at least 90% alpha phase and Y2O3 and/or Al2O3 as sintering aid before hot isostatic pressing treatment using a glass capsule. The preliminary sintering is selected to achieve a silicon nitride beta -phase forming ratio of 20-60%.

IPC 1-7

C04B 35/58

IPC 8 full level

C04B 35/593 (2006.01)

CPC (source: EP)

C04B 35/593 (2013.01)

Citation (search report)

• [X] CHEMICAL ABSTRACTS, vol. 99, no. 16, 1983, page 289, abstract no. 127319k, Columbus, Ohio, US; & JP-A-58 91 074 (TOSHIBA CORP.) 30-05-1983
• [X] CERAMIC ABSTRACTS, vol. 62, no. 9/10, Setember/October 1983, page 327, column 2, abstract no. 62-06848A, Columbus, Ohio, US; K. HOMMA et al.: "Sintering and hot isostatic pressing conditions of silicon nitride", & ZAIRYO, 1982, 31[10], 960-6
• [A] CHEMICAL ABSTRACTS, vol. 99, no. 16, 1983, page 290, abstract no. 127329p, Columbus, Ohio, US; & JP-A-58 88 171 (KOBE STEEL, LTD) 26-05-1983

Designated contracting state (EPC)

DE FR GB

DOCDB simple family (publication)

EP 0334543 A2 19890927; EP 0334543 A3 19901017; JP H01242466 A 19890927

DOCDB simple family (application)

EP 89302547 A 19890315; JP 6731388 A 19880323